The invention relates to a polymer coating material with corrosion-detecting and self-repairing functions and a preparation method. The polymer coating material is prepared from a polymer resin, and a fluorescence detection reagent and a self-repairing reagent loaded on a polymer microcapsule, wherein the mass concentration of the fluorescence detection reagent and the self-repairing reagent in the polymer coating is not lower than 5ppm; the polymer microcapsule is a porous-structure or hollow-structure polymer, and preferably, the polymer microcapsule is a hollow polystyrene microsphere, a porous polydivinylbenzene microsphere or a hollow polydivinylbenzene/polyacrylic acid microsphere. The dual-function intelligent polymer coating with environmental response provided by the invention can respond to corrosion in time when corrosion occurred, and the self-detection and the self-repairing of corrosion can be effectively realized, so that the service life of a metal matrix is prolonged.